From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Subject: Re: Optimize RAID0 for max IOPS? Date: Fri, 21 Jan 2011 20:34:57 +0100 Message-ID: <20110121193457.C7719D30268@gemini.denx.de> References: <20110118210112.D13A236C@gemini.denx.de> <4D361F26.3060507@stud.tu-ilmenau.de> <20110119192104.1FA92D30267@gemini.denx.de> <4D37677D.9010108@stud.tu-ilmenau.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-reply-to: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim Cc: stefan.huebner@stud.tu-ilmenau.de, linux-raid@vger.kernel.org List-Id: linux-raid.ids Dear Roberto, In message you wrote: > a good idea.... > why not start a opensource raid controller? > what we need? a cpu, memory, power supply with battery or capacitor, > sas/sata (disk interfaces), pci-express or another (computer > interface) > it don=B4t need a operational system, since it will only run one prog= ram > with some threads (ok a small operational system to implement threads > easly) > > we could use arm, fpga, intel core2duo, atlhon, xeon, or another syst= em... You could evenuse a processor dedicated for such a job, like a PPC440SPe or PPC460SX or similar, which provide hardware-offload capabilities for the RAID calculations. These are even supported by drivers in mainline Linux. But again, thee would not helpo to maximize IOPS - goal for optimization has always been maximum sequential troughput only (and yes, I know exactly what I'm talking about; guess where the aforementioned drivers are coming from). Best regards, Wolfgang Denk --=20 DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de I don't see any direct evidence ... but, then, my crystal ball is in dire need of an ectoplasmic upgrade. :-) -- Howard Smith -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html